:root{--bg:#EEF0F8;--bg-deep:#E0E4F2;--surface:#F7F8FD;--surface-2:#EBEEF8;--ink:#1A1840;--text:#2C2A48;--muted:#5A5680;--soft:#7A76A0;--purple:#5B4BDB;--blue:#3A6BD4;--deep:#1C1A3A;--mist:#8AA4E0;--lilac:#8A6AD4;--border:rgba(58,107,212,.18);--border-strong:rgba(91,75,219,.42);--shadow:0 12px 28px rgba(28,26,58,.08);--radius:12px;--shell:1000px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.shell{width:min(calc(100% - 32px),var(--shell));margin:0 auto}.top-addressbar{position:fixed;z-index:1000;top:0;left:0;right:0;height:22px;background:var(--deep);color:#F7F8FD;font-size:12px}.addressbar-inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:16px}.text-button{border:0;background:transparent;color:#F7F8FD;min-width:44px;min-height:22px;cursor:pointer}.masthead{position:fixed;z-index:999;top:22px;left:0;right:0;height:54px;background:#EBEAF8;border-bottom:1px solid var(--border-strong)}.masthead-inner{height:54px;display:grid;grid-template-columns:1fr auto 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var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow)}.step-stack{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:14px}.step-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;box-shadow:var(--shadow)}.step-card.offset{margin-left:24px}.tag-wrap{display:flex;flex-wrap:wrap;gap:10px}.tag{padding:7px 14px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);font-size:13px;color:var(--deep)}.tag-panel{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:var(--shadow)}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.compare-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:var(--shadow)}.compare-card.deep{background:var(--deep);color:#F7F8FD}.compare-card.deep h2,.compare-card.deep 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@media (max-width:460px){.footer-grid{grid-template-columns:1fr 1fr;gap:18px}.drawer-group a{grid-template-columns:76px 1fr}.app-link{font-size:13px}.masthead-inner{gap:6px}.shell{width:min(calc(100% - 32px),var(--shell))}}